CN109627656B - Transparent permanent antistatic PMMA material and preparation method and application thereof - Google Patents
Transparent permanent antistatic PMMA material and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention belongs to the technical field of high polymer materials, and discloses a transparent permanent antistatic PMMA material, and a preparation method and application thereof. The PMMA material comprises the following components in parts by weight: 50-110 parts of PMMA, 2-45 parts of antistatic agent, 0-8 parts of toughening agent, 0-1 part of stabilizing agent and 0.1-1 part of antioxidant. The transparent permanent antistatic PMMA material obtained by the invention has the advantages of simple preparation and excellent molding processability, and can be used for preparing dustproof, antistatic and other products or packaging materials in processing molding modes such as injection molding, tape casting and the like.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a transparent permanent antistatic PMMA material, and a preparation method and application thereof.
Background
Polymethyl methacrylate (poly) is abbreviated as PMMA, commonly called organic glass, and called Acrylic sheet in America, English, Germany, Japan and the like. Solid shaped articles obtained by bulk polymerization are known as PMMA. The PMMA is inflammable, has excellent transparency, higher strength, certain heat resistance and cold resistance, corrosion resistance and good insulativity, and is widely applied to instruments, instrument parts, automobile parts, electrical appliance insulating materials and the like. The excellent electrical insulation of PMMA products also causes problems that static electricity is easily generated on the surface of PMMA products upon friction, resulting in static charge accumulation, and dust in the air is easily adsorbed or electric shock is easily caused during the processing or final use of the PMMA products, even fire and explosion accidents are caused. Thus, the antistatic modification of PMMA is of great significance.
In the prior art, the antistatic effect of PMMA is mainly achieved by two methods, one is achieved by spraying an antistatic layer on the surface, for example, in the prior art, firstly, sol is prepared by using a silane coupling agent, ethanol and acetic acid, then, fullerene alcohol solid is prepared by using fullerene, the sol and the fullerene alcohol solid are added into a polymethyl methacrylate prepolymer, the sol and the fullerene alcohol solid are uniformly mixed to obtain a coating solution, and finally, the coating solution is coated on a substrate and is cured to obtain the antistatic organic glass film. The method has complicated process, and the used raw materials such as fullerene are expensive and are not suitable for large-scale industrial production. Another approach is to obtain antistatic PMMA by introducing hydrophilic groups during the synthesis of PMMA, for example by introducing sulfonate monomers. The method modifies the molecular structure of PMMA, has large influence on the mechanical property of PMMA, has large introduction difficulty and high cost during polymerization, and is not suitable for large-scale application.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a transparent permanent antistatic PMMA material and a preparation method and application thereof.
A PMMA material comprises the following components in parts by weight: 50-110 parts of PMMA, 2-45 parts of antistatic agent, 0-8 parts of toughening agent, 0-1 part of stabilizing agent and 0.1-1 part of antioxidant. For example, the antistatic PMMA material comprises the components in parts by weight: 60-100 parts of PMMA, 5-35 parts of antistatic agent, 0-5 parts of toughening agent, 0-0.6 part of stabilizing agent and 0.1-0.5 part of antioxidant.
According to the PMMA material, the using amount of PMMA can be 60-94.9 parts and 70-85 parts by weight; illustratively, the PMMA may be used in amounts of 79.8 parts, 84.5 parts, 84.7 parts, 84.8 parts, 89.8 parts, 94.7 parts, 96.2 parts.
According to the PMMA material, the melt flow rate of PMMA can be 2-15 g/10min, such as 2-8 g/10 min.
According to the PMMA material, the dosage of the antistatic agent can be 5-30 parts and 10-25 parts by weight; illustratively, the antistatic agent may be used in an amount of 5 parts, 10 parts, 15 parts, 25 parts, 30 parts.
According to the PMMA material of the present invention, the weight ratio of the PMMA and the antistatic agent may be 1-20:1, exemplarily 2-6:1, such as 2.2:1, 3.2:1, 5.6: 1.
According to the PMMA material of the invention, the antistatic agent can be acrylate monomer and polyetherCopolymers of monomers. For example, the acrylate monomers may be selected from polyoxyethylene ether acrylates; the polyether monomer may be one or two selected from 3-methyl-3-butenyl polyoxyethylene ether and 2-methyl-allyl polyoxyethylene ether. Further, the number average molecular weight (M) of the acrylate monomern) May be 1000 to 5000, such as 1200 to 4000; illustratively, the number average molecular weight of the acrylate monomer may be 1200, 2000, 2400, 3000, 4000. Further, the number average molecular weight (M) of the polyether monomern) Can be 1000 to 4000, such as 1200 to 3500; illustratively, the polyether monomer may have a number average molecular weight of 1200, 2400, 3000.
Preferably, the antistatic agent has a number average molecular weight (M)n) Can be 20000 to 50000, such as 22000 to 40000 and 24800 to 3970; illustratively, M of the antistatic agentn＝24800、29800、34500、35600、39700。
For example, according to the PMMA material of the present invention, the toughening agent can be used in an amount of 0 to 3 parts by weight, such as 0 part, 1 part, 2 parts, 3 parts. For example, the toughening agent can be selected from vinyl elastomer materials; for example, the ethylene-based elastomer material may be selected from one, two or more of ethylene-acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylate-glycidyl methacrylate copolymer, and the like.
According to the PMMA material, the antioxidant can be used in an amount of 0.1-0.3 parts, such as 0.1 part, 0.2 part and 0.3 part by weight. For example, the antioxidant may be selected from one or both of hindered phenol-based antioxidants and phosphites; preferably, the antioxidant may be one, two or more selected from the group consisting of antioxidant 1010 (pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate), 1098(N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine), 168 (tris [2, 4-di-tert-butylphenyl ] phosphite), 626 (bis (2, 4-di-tert-butylphenol) pentaerythritol diphosphite).
According to the PMMA material of the invention, the amount of the stabilizer is 0-0.5 part by weight, such as 0 part, 0.1 part, 0.2 part and 0.5 part. Preferably, the stabilizer may be selected from one or both of octadecyl phosphate and stearate.
Furthermore, the PMMA material can be processed into products by adopting injection molding, tape casting and other modes. For example, the product may be in the form of a film, a sheet, or the like.
Further, the invention also provides a preparation method of the PMMA material, which comprises the following steps: adding PMMA, an antistatic agent, a toughening agent, a stabilizer and an antioxidant into a high-speed mixer for fully mixing, transferring the mixture into a double-screw extruder for melting at 160-270 ℃ (for example, 180-250 ℃), devolatilizing, granulating and drying.
According to the preparation method of the invention, the length-diameter ratio of the twin-screw extruder can be 40-60, such as 45-50, and exemplarily 48.
According to the preparation method of the invention, the double-screw extruder is provided with 10-15 sections of charging barrels, such as 12 sections of charging barrels. Preferably, the melting temperature of each section of the barrel may be: the temperature of the second-stage barrel is 180 to 195 ℃ (e.g., 180 ℃, 185 ℃, 190 ℃, 195 ℃), the temperature of the third-stage barrel is 230 to 240 ℃ (e.g., 230 ℃, 235 ℃, 240 ℃), the temperature of the fourth-stage barrel is 220 to 250 ℃ (e.g., 220 ℃, 225 ℃, 230 ℃, 240 ℃, 245 ℃, 250 ℃), the temperature of the fifth-stage barrel is 220 to 240 ℃ (e.g., 220 ℃, 225 ℃, 230 ℃, 235 ℃, 240 ℃), the temperature of the sixth-stage barrel is 210 to 240 ℃ (e.g., 210 ℃, 215 ℃, 220 ℃, 230 ℃, 235 ℃, 240 ℃), the temperature of the seventh-stage barrel is 210 to 230 ℃, e.g., 210 ℃, 215 ℃, 220 ℃, 225 ℃, 230 ℃), the temperature of the eighth-stage barrel is 205 to 225 ℃ (e.g., 205 ℃, 215 ℃, 220 ℃, 225 ℃), 205 to 225 ℃ (e.g., 205 ℃, 210 ℃, 215 ℃, 220 ℃, 225 ℃ and the temperature of the tenth-stage barrel is 205 to 225 ℃ (e.g., 205 to 205, 210 ℃, 215 ℃, 220 ℃, 225 ℃) and the eleventh barrel temperature is 205 to 225 ℃ (for example, 205 ℃, 210 ℃, 215 ℃, 220 ℃, 225 ℃) and the twelfth barrel temperature is 205 to 225 ℃ (for example, 205 ℃, 210 ℃, 215 ℃, 220 ℃, 225 ℃).
According to the preparation method of the invention, the head temperature of the double-screw extruder can be 205-225 ℃, such as 205 ℃, 210 ℃, 215 ℃, 220 ℃ and 225 ℃.
According to the preparation method of the invention, the feeding frequency of the double-screw extruder can be 30-50 Hz, such as 40 Hz.
According to the preparation method of the invention, the rotating speed of the double-screw extruder can be 180-550 revolutions per minute, such as 200-500 revolutions per minute.
According to the preparation method of the invention, the vacuum degree in the double-screw extruder can be-0.08 MPa, such as-0.05 MPa.
Furthermore, the invention also provides application of the PMMA material in aspects of electronic and electric fittings, packaging materials and the like.
The invention also provides the application of the copolymer of the acrylate monomer and the polyether monomer in the PMMA material antistatic agent.
The invention has the beneficial effects that:
(1) the macromolecular permanent antistatic agent adopted by the invention can form a polymer network structure in a polymer, has a permanent antistatic effect and has the advantage of migration resistance.
(2) The high molecular antistatic agent selected by the invention has good compatibility with PMMA, the melt viscosity difference and the viscosity ratio of the high molecular antistatic agent and the PMMA are in a proper range through specific proportion, temperature and shear rate control in the processing process, and the obtained product has excellent transparency.
(3) The antistatic agent used in the invention can realize excellent antistatic performance, does not influence the mechanical performance of products, has simple preparation process and low cost, and is beneficial to large-scale commercial production.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that various changes or modifications can be made by those skilled in the art after reading the disclosure of the present invention, and such equivalents also fall within the scope of the invention.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; reagents, materials and the like used in the following examples are commercially available unless otherwise specified.
The parts in the examples of the present invention are expressed in kilograms per part, but this does not represent a limitation on the scope of the present invention. One skilled in the art can modify the reference to other weights as desired.
The following examples and comparative examples use starting materials and equipment comprising:
PMMA-1: the flow rate of the melt is 2g/10min for the Nantong Liyang VH 001;
PMMA-2: taiwan Chimei CM-207, melt flow rate 8g/10 min;
a toughening agent: EMA (ethylene-methyl acrylate copolymer), arkema AX8900, france;
a stabilizer: octadecyl phosphate;
antioxidant-1: easily-available chemical 1010 (pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate) ];
antioxidant-2: is very easy to be chemical 168 (tris [2, 4-di-tert-butylphenyl ] phosphite);
commercial antistatic agent-1: cocoamine polyoxyethylene ether;
commercial antistatic agent-2: IonPhasE IPE eSTAT;
equipment: cobaron CTE35 model twin screw extruder.
The antistatic agents used in examples 1 to 8 were prepared by the synthetic method described in patent No. 201610168598.4. The synthesis method comprises the following steps: deionized water, an acrylate monomer a and a polyether monomer B were added to a glass reactor equipped with a thermometer, a stirrer, a dropping funnel and a reflux condenser, which were then heated to 65 ℃, followed by dropwise addition of a 40% mixed aqueous solution of acrylic acid, sodium methallylsulfonate and sodium hypophosphite and a 37.2% aqueous solution of ammonium persulfate over 3 hours and 3.5 hours, respectively. Then the temperature was maintained at 65 ℃ until the polymerization reaction was completed, then the resulting reaction mixture was cooled to not more than 50 ℃ and then neutralized with 30% aqueous sodium hydroxide solution to adjust the pH to 5-7, and the resulting aqueous copolymer solution was spray-dried to obtain an antistatic agent product. The product name of the antistatic agent, the molecular weights of the acrylate monomer A, the polyether monomer B and the antistatic agent product are shown in Table 1.
Table 1.
Example 1
PMMA, an antistatic agent, a stabilizer and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 205 ℃, the temperature of a ninth section of the charging barrel is 205 ℃, the temperature of a tenth section of the charging barrel is 205 ℃, the temperature of a twelfth section of the charging barrel is 205 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 400 revolutions per minute, and the vacuum degree is-0.. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 2
PMMA, an antistatic agent and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted and extruded for granulation after being uniformly mixed, the temperature of a second section of the charging barrel is 180 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 205 ℃, the temperature of a ninth section of the charging barrel is 205 ℃, the temperature of a tenth section of the charging barrel is 205 ℃, the temperature of a eleventh section of the charging barrel is 205 ℃, the temperature of a machine head is 205 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 3
PMMA, an antistatic agent, a toughening agent and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 205 ℃, the temperature of a ninth section of the charging barrel is 205 ℃, the temperature of a tenth section of the charging barrel is 205 ℃, the temperature of a twelfth section of the charging barrel is 205 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 400 rpm, and the vacuum degree is-0.05. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 4
PMMA, an antistatic agent, a stabilizer and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 215 ℃, the temperature of a ninth section of the charging barrel is 215 ℃, the temperature of a tenth section of the charging barrel is 215 ℃, the temperature of a twelfth section of the charging barrel is 215 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 400 turns/minute, and the vacuum degree is 0.. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 5
PMMA, an antistatic agent and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 230 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 205 ℃, the temperature of a ninth section of the charging barrel is 205 ℃, the temperature of a tenth section of the charging barrel is 205 ℃, the temperature of a eleventh section of the charging barrel is 205 ℃, the temperature of a machine head is 205 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 500 rpm, and. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 6
PMMA, an antistatic agent, a toughening agent, a stabilizer and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted and extruded for granulation after being uniformly mixed, the temperature of the second section of the charging barrel is 195 ℃, the temperature of the third section of the charging barrel is 240 ℃, the temperature of the fourth section of the charging barrel is 250 ℃, the temperature of the fifth section of the charging barrel is 240 ℃, the temperature of the sixth section of the charging barrel is 240 ℃, the temperature of the seventh section of the charging barrel is 230 ℃, the temperature of the eighth section of the charging barrel is 225 ℃, the temperature of the ninth section of the charging barrel is 225 ℃, the temperature of the tenth section of the charging barrel is 225 ℃, the temperature of the twelfth section of the charging barrel is 225 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 200 rpm, and the vacuum degree is. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 7
PMMA, an antistatic agent and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 205 ℃, the temperature of a ninth section of the charging barrel is 205 ℃, the temperature of a tenth section of the charging barrel is 205 ℃, the temperature of a eleventh section of the charging barrel is 205 ℃, the temperature of a machine head is 205 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 400 turns/minute. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
example 8
PMMA, an antistatic agent and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 230 ℃, the temperature of a fifth section of the charging barrel is 230 ℃, the temperature of a sixth section of the charging barrel is 230 ℃, the temperature of a seventh section of the charging barrel is 230 ℃, the temperature of an eighth section of the charging barrel is 220 ℃, the temperature of a ninth section of the charging barrel is 225 ℃, the temperature of a tenth section of the charging barrel is 225 ℃, the temperature of an eleventh section of the charging barrel is 225 ℃, the temperature of a twelfth section of the charging barrel is 225 ℃, the temperature of a machine head is 225 ℃, the feeding frequency is 40 Hz. Obtaining the transparent permanent antistatic PMMA material.
The weight parts of the components are as follows:
comparative example 1
PMMA, an antistatic agent, a toughening agent and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted, extruded and granulated, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 210 ℃, the temperature of a seventh section of the charging barrel is 210 ℃, the temperature of an eighth section of the charging barrel is 205 ℃, the temperature of a ninth section of the charging barrel is 205 ℃, the temperature of a tenth section of the charging barrel is 205 ℃, the temperature of a twelfth section of the charging barrel is 205 ℃, the feeding frequency is 40 Hz, the rotating speed of a main machine is 400 rpm, and the vacuum degree is-0.05. Obtaining the PMMA material.
The weight parts of the components are as follows:
comparative example 2
PMMA, an antistatic agent, a toughening agent, a stabilizer and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted and extruded for granulation after being uniformly mixed, the temperature of a second section of the charging barrel is 185 ℃, the temperature of a third section of the charging barrel is 230 ℃, the temperature of a fourth section of the charging barrel is 220 ℃, the temperature of a fifth section of the charging barrel is 220 ℃, the temperature of a sixth section of the charging barrel is 220 ℃, the temperature of a seventh section of the charging barrel is 220 ℃, the temperature of an eighth section of the charging barrel is 220 ℃, the temperature of a ninth section of the charging barrel is 220 ℃, the temperature of a tenth section of the charging barrel is 210 ℃, the temperature of a twelfth section of the charging barrel is 210 ℃, the temperature of a machine head is 210 ℃, the feeding frequency is 40 Hz, the rotating speed of a main. Obtaining the PMMA material.
The weight parts of the components are as follows:
comparative example 3
PMMA, an antistatic agent, a toughening agent, a stabilizer and an antioxidant are added into a high-speed mixer to be fully mixed, the mixture is transferred to an extruder with double screws with a length-diameter ratio of 48 and 12 sections of charging barrels to be melted and extruded for granulation after being uniformly mixed, the temperature of the second section of the charging barrel is 250 ℃, the temperature of the third section of the charging barrel is 260 ℃, the temperature of the fourth section of the charging barrel is 270 ℃, the temperature of the fifth section of the charging barrel is 280 ℃, the temperature of the sixth section of the charging barrel is 280 ℃, the temperature of the seventh section of the charging barrel is 280 ℃, the temperature of the eighth section of the charging barrel is 280 ℃, the temperature of the ninth section of the charging barrel is 280 ℃, the temperature of the eleventh section of the charging barrel is 280 ℃, the temperature of the head is 270 ℃, the feeding frequency is 60 Hz, the rotating speed of a main machine is 400 rpm, and the vacuum degree is-0.05 MPa. Obtaining the PMMA material.
The weight parts of the components are as follows:
test example
The transparent permanently antistatic PMMA materials obtained in examples 1 to 8 and the PMMA materials obtained in comparative examples 1 to 3 were subjected to the following performance tests according to certain of the following test standards and test conditions:
(1) surface resistivity
The test is carried out according to the GB/T1410-2006 standard, the test temperature is 23 ℃, and the relative humidity is 50%. The test results are shown in Table 2.
(2) Light transmittance
The test is carried out according to GB/T2410-2008 standard, the test temperature is 23 ℃, and the relative humidity is 50%. The test results are shown in Table 2.
(3) Impact strength of simply supported beam notch
The test is carried out according to GB/T1843-2008 standard, the test temperature is 23 ℃, and the relative humidity is 50 percent. The test results are shown in Table 2.
(4) Injection molding sheet preparation method
A sheet sample with the injection thickness of 1-4 cm can be prepared on an injection molding machine of jolt-squeeze JM98-SVP/2 at the melting temperature of 200-240 ℃.
(5) Preparation method of cast film
The melt temperature is 200-240 ℃ on a Haake casting machine, and a transparent film with the extrusion width of 30cm and the thickness of 100 mu m can be prepared.
Table 2.
As can be seen from Table 1, the transparent permanent antistatic PMMA materials prepared in the examples 1-8 of the invention have a significant antistatic effect, which is far superior to that of the comparative examples 1-3, and the antistatic effect of the antistatic agent is excellent, the dispersibility in the product is good, the transparency is good, and the toughness of the material is well maintained. The product has excellent comprehensive performance, can meet the requirements of injection molding, thin film and other molded parts, has simple preparation process and low cost, and is beneficial to large-scale commercial production.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (20)
1. A PMMA material is characterized by comprising the following components in parts by weight: 50-110 parts of PMMA, 2-45 parts of antistatic agent, 0-8 parts of toughening agent, 0-1 part of stabilizing agent and 0.1-1 part of antioxidant;
the antistatic agent is a copolymer of an acrylate monomer and a polyether monomer;
the acrylate monomer is selected from acrylic acid polyoxyethylene ether ester;
the polyether monomer is selected from one or two of 3-methyl-3-butenyl polyoxyethylene ether and 2-methyl-allyl polyoxyethylene ether;
the preparation process of the PMMA material is as follows: adding PMMA, an antistatic agent, a toughening agent, a stabilizer and an antioxidant into a high-speed mixer, fully mixing, transferring the mixture into a double-screw extruder after uniformly mixing, melting at 160-270 ℃, devolatilizing, granulating and drying;
the melting temperature of each section of charging barrel of the double-screw extruder is as follows: the temperature of the second section of the material cylinder is 180-195 ℃, the temperature of the third section of the material cylinder is 230-240 ℃, the temperature of the fourth section of the material cylinder is 220-250 ℃, the temperature of the fifth section of the material cylinder is 220-240 ℃, the temperature of the sixth section of the material cylinder is 210-240 ℃, the temperature of the seventh section of the material cylinder is 210-230 ℃, the temperature of the eighth section of the material cylinder is 205-225 ℃, the temperature of the ninth section of the material cylinder is 205-225 ℃, the temperature of the tenth section of the material cylinder is 205-225 ℃, the temperature of the eleventh section of the material cylinder is 205-225 ℃ and the temperature of the twelfth section of the material cylinder is 205-225 ℃.
2. The PMMA material of claim 1, wherein the PMMA is used in an amount of 60 to 94.9 parts by weight.
3. PMMA material according to claim 1 or 2, characterized in that the melt flow rate of PMMA is 2-15 g/10 min.
4. The PMMA material of claim 1, wherein the antistatic agent is used in an amount of 5 to 30 parts by weight.
5. PMMA material according to claim 1 or 4, characterized in that the antistatic agent has a number average molecular weight (M)n) 20000 to 50000.
6. The PMMA material of claim 1, wherein the toughening agent is used in an amount of 0 to 3 parts by weight.
7. PMMA material according to claim 1 or 6, characterised in that the flexibiliser is selected from vinyl elastomer materials.
8. The PMMA material of claim 1, wherein the stabilizer is used in an amount of 0 to 0.5 parts by weight.
9. PMMA material according to claim 1 or 8, characterized in that the stabilizer is selected from one or both of octadecyl phosphate and stearate.
10. The PMMA material of claim 1, wherein the antioxidant is used in an amount of 0.1-0.3 parts by weight.
11. PMMA material according to claim 1 or 10, wherein the antioxidant is selected from one or both of hindered phenolic antioxidants and phosphites.
12. Use of a copolymer of an acrylate monomer and a polyether monomer for an antistatic agent for PMMA materials; wherein the acrylate monomer is selected from acrylic acid polyoxyethylene ether ester, and the polyether monomer is selected from one or two of 3-methyl-3-butenyl polyoxyethylene ether and 2-methyl-allyl polyoxyethylene ether.
13. The method for processing the PMMA material of any one of claims 1 to 11, which is characterized in that the PMMA material is processed into an article by injection molding or casting.
14. A method of producing a PMMA material according to any of claims 1 to 11, wherein the method comprises a process of producing the PMMA material according to any of claims 1 to 11.
15. The method of claim 14, wherein the twin-screw extruder has an aspect ratio of 40 to 60.
16. The method for preparing the polypropylene composition according to claim 14, wherein the head temperature of the twin-screw extruder is 205 to 225 ℃.
17. The preparation method of claim 14, wherein the feeding frequency of the twin-screw extruder is 30 to 50 Hz.
18. The method as claimed in claim 14, wherein the twin-screw extruder is rotated at a speed of 180 to 550 rpm.
19. The production method according to claim 14, wherein the degree of vacuum in the twin-screw extruder is-0.08 to 0.08 MPa.
20. Use of the PMMA material of any one of claims 1 to 11 in the fields of electronic and electric fittings and packaging materials.
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| CN110228989A (en) * | 2019-07-04 | 2019-09-13 | 浙江恒起新材料科技有限公司 | A kind of water-proof light permeable gypsum and preparation method thereof |
| CN114752169A (en) * | 2022-03-22 | 2022-07-15 | 苏州新华美塑料有限公司 | High-impact transparent PMMA composite material filled with optical rod waste modified powder and preparation method thereof |
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